Language Arts for Kids/Identifying simple subjects and predicates

QuestionUnfortunately, I am stuck with a question that has been bothering me for a while.
In the question:
Have you seen something so fantastic?

In this question, I am having trouble finding the simple predicate. Is it "seen" or is it "have seen"? I know the simple subject is you (right?). If someone could explain what the answer is, how they found the answer, and any tips you can share about this topic, please do!

Thanks,
MRS. STYLES :)

AnswerDear Mrs. Styles,
In a question sentence, always try to put it into a statement.
Have you seen something so fantastic?
You have seen something so fantastic.
Then the simple subject is shown to be "you".
The simple predicate is a verb with a helping verb..."have seen"
There is more information on my website,
Go to my website: teachropubliccomputingservices.org
Thanks for using AllExperts.
Mrs. Lenc

Expertise

I am a retired Middle School teacher. I am an expert in grammar (structure of the English
language) and writing. I have been a volunteer with AOL Ask A Teacher and have
submitted many articles and special collections (one on diagramming sentences and one
with worksheets and answers so students can check their own practice on grammar skills)
to their knowledge database. I still am with them but would like other work where I can
help students with their English study. I have time to help you with this, if you want me. I
can help with grade school, middle school and high school grammar & writing and can
also look up information on literature (reading) for students and help them with it.
Please let me know if I can be of help in these areas. Thank you.
Rosemary Lenc

Experience

Past/Present clientsHave helped many, many students in grade school language arts, middle school and high
school grammar and writing in both the chat rooms (live help that AOL use to have) and
message board answers plus the many students i have taught as a teacher.